The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2017
Filed:
Feb. 12, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Shuhei Yamamoto, Tokyo, JP;
Katsumoto Hosokawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a light-shielding film for optical element having durability under high temperature and high humidity conditions and resistance to a cleaning liquid. A light-shielding coating film for optical element containing: a cured substance at least containing an epoxy resin, titania fine particles, a dye, and an amine curing agent, in which the equivalent ratio (A/E) of the active hydrogen equivalent weight (A) of the amine curing agent and the epoxy equivalent weight (E) of the epoxy resin and the compounding ratio (A'/E′) of the amine curing agent amount (A′) and the epoxy resin amount (E′) satisfy the following expression 1,1.1≦(′)/())≦1.7.  (Expression 1)
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile